U.S. says they're stoking false hopes ARIVACA, Ariz. – Andy Sellers anxiously drives the woman north in a dusty 1992 Nissan Pathfinder dubbed "the Desert Rat." Just 12 miles from the U.S.-Mexico border, he passes the first of five U.S. Border Patrol vehicles. He can't help but think of the two colleagues arrested weeks earlier on charges of transporting illegal immigrants – just what he was doing. Mr. Sellers, 23, is one of hundreds of volunteers with the humanitarian group No More Deaths. Their goal: to aid lost, abandoned or injured illegal immigrants. "I was a little nervous when I...